Arduino Uno won't load programs

New, out of box Uno doesn't load programs.

Driver load seemed to go well ... COM9 assigned. All settings in Sketch (COMPORT, BOARD) are correct.
But I can't load BLINK.

avrdude: ser_send(): write error: sorry no info avail

This is an XP computer. I've tried the same loading process on another XP computer and all works well: BLINK loads properly and runs on that machine.

Suggestions appreciated

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